Home Health Billing Services
Home health is the setting where the money is decided before the first visit. The start-of-care OASIS and the principal diagnosis recorded on it place each 30-day period into one of the 432 case-mix groups Medicare pays from, and a functional item scored against the clinician's impression rather than against the clinical record moves that period's payment by hundreds of dollars in either direction. Nothing downstream recovers it. The claim is only the receipt for a decision already made in the patient's living room, which is why we do most of our work before it is written. We read the OASIS before it locks, checking the functional items and the primary and secondary diagnoses that carry payment weight against what the chart actually says, and we flag a principal diagnosis that will not group — a status code, or one that does not support the skilled need the plan of care describes — rather than letting it come back as a returned claim weeks later. We file the Notice of Admission inside the five-calendar-day window from start of care, because every day past it takes a fixed slice off the whole period payment and no appeal puts that back. We count visits against the low-utilization threshold this particular case-mix group carries while the period is still open and a justified visit can still be added, instead of discovering the drop to per-visit payment after the period closes. We track the face-to-face encounter and the certification chain, in the certifying provider's own record where payers require it to live. And we keep Medicare Advantage periods on their own path, because those plans run payment models of their own rather than the Medicare one. We work with agencies billing traditional Medicare, Medicare Advantage and state Medicaid, single-site or multi-state, including agencies still correcting assessments after the fact rather than before.
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What does home health billing involve?
We bill home health agencies period by period: OASIS review before lock, PDGM grouping, Notice of Admission filing, final claims carrying the discipline G-code CMS assigns to each visit, and the follow-up when a period is returned. Our work sits upstream of the claim, because home health is the setting where payment is largely decided before the first visit — the start-of-care OASIS and the primary ICD-10 set the case-mix group, and an NOA filed past day five cuts the period payment for every late day, whatever the clinical work looked like. The code table below shows CY2026 Medicare physician fee schedule amounts, computed as total non-facility RVUs times the 33.4009 conversion factor in the relative value file. Only the home-visit E/M codes carry one. The G-code visit lines are blank because CMS excludes them from the physician fee schedule entirely — a skilled nursing or therapy visit is paid inside the 30-day period payment, which is exactly why we put our review hours into the OASIS and the NOA rather than into the visit count.
- OASIS-E checked against the clinical record before lock, on the M1021 and M1023 diagnoses and the M1800–M1860 functional items that move the case-mix weight
- Primary diagnosis reviewed for PDGM clinical-grouping fit, so a non-payable or Z-code primary does not return the claim
- Notice of Admission filed inside the five-calendar-day window from start of care, then each visit line carrying its own discipline G-code — G0151/G0157 physical therapy, G0152/G0158 occupational therapy, G0153 speech-language pathology, G0299/G0300 skilled nursing
- Visit counts tracked against that case-mix group's LUPA threshold before the period closes, not after payment drops to per-visit
- Free billing review before you switch — we tell you what we would change on your next OASIS and why
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Common Billing Friction in Home Health
OASIS coding accuracy and the case-mix weight cascade
Every OASIS-E item with a payment downstream effect — M1800 grooming, M1810/M1820 dressing, M1830 bathing, M1840 toilet transferring, M1850 transferring, M1860 ambulation, plus the M1021 primary diagnosis and M1023 other diagnoses driving clinical grouping — translates directly into the PDGM functional impairment level and comorbidity adjustment. A clinician who scores M1860 ambulation at level 2 (independent with an assistive device) versus level 4 (chair-fast or bedfast) shifts the functional impairment from low to medium and changes the case-mix weight enough to move episode payment by hundreds of dollars. Targeted Probe and Educate (TPE) reviews at MAC contractors specifically pull OASIS-clinical-record consistency, and discrepancies trigger recoupment under medical review.
PDGM clinical grouping assignment and ICD-10 primary diagnosis discipline
PDGM assigns each 30-day period to one of twelve clinical groupings based on the principal ICD-10 diagnosis. CMS names them as musculoskeletal rehabilitation; neuro/stroke rehabilitation; wounds; medication management, teaching and assessment (MMTA) - surgical aftercare; MMTA - cardiac and circulatory; MMTA - endocrine; MMTA - gastrointestinal tract and genitourinary system; MMTA - infectious disease, neoplasms and blood-forming diseases; MMTA - respiratory; MMTA - other; behavioral health; and complex nursing interventions. MMTA - other is a residual clinical group, not a catch-all for vague coding: a principal diagnosis that does not group to any of the twelve returns the claim to the agency. Z-codes (status codes) generally do not qualify as primary on the home health claim. The primary diagnosis must justify the skilled need at the level the OASIS clinical grouping is configured to support, and pairing a wound clinical grouping with a primary diagnosis that does not include the wound ICD-10 produces a clinical grouping mismatch.
Notice of Admission and timely-filing windows after the 2022 RAP elimination
CMS eliminated the Request for Anticipated Payment (RAP) for home health on January 1, 2022, replacing it with a no-pay Notice of Admission (NOA) due within 5 calendar days of start of care. Late NOA submissions trigger a per-day payment reduction, and the day it counts from is the part agencies most often get wrong. Under 42 CFR 484.205(j)(3), read 2026-09-17, the wage- and case-mix-adjusted 30-day period payment is reduced by 1/30th for each day from the start-of-care date until the date the NOA is filed — not for each day past day 5. An NOA filed on day 11 therefore costs 11/30ths of that period's payment, roughly 37%, not the 20% a five-day-grace reading implies. No LUPA payments are made inside the late period, and the reduction cannot exceed the total payment on the claim. Final claims must follow within timely filing — 12 months from start of care — but agencies that miss the NOA window have already locked in a payment haircut before the visits are even completed. The final claim then carries a visit-level G-code per discipline, which CMS maps in Pub. 100-04 Chapter 10 alongside the matching revenue code: G0151 qualified physical therapist and G0157 physical therapist assistant (revenue code 042x), G0152 qualified occupational therapist and G0158 occupational therapy assistant (043x), G0153 qualified speech-language pathologist (044x), G0299 and G0300 skilled nursing by an RN and an LPN respectively (055x), G0155 medical social services (056x) and G0156 the home health aide (057x). Reporting skilled nursing as G0151 — a mapping that circulates widely — bills a physical therapy visit instead.
LUPA thresholds and the clinical-grouping-specific visit count
Each PDGM case-mix group has its own LUPA threshold ranging from 2 to 6 visits — fall below it and the 30-day period is paid per visit (G-code rates) instead of as a full episode. The 2024 LUPA add-on payment reduces but does not eliminate the differential. LUPA risk concentrates in early-discharge episodes and second-period recerts where the patient has already plateaued. Active visit-count tracking against the case-mix-specific threshold lets clinical teams add a justified visit before the period ends rather than discovering the LUPA after the period has closed and payment has already converted to the per-visit rate. How far it falls depends on the visit count and the discipline mix, so we do not quote a percentage for it.
Face-to-face encounter, physician certification, and the homebound documentation chain
CMS requires a face-to-face encounter with the certifying physician or allowed NPP within 90 days before or 30 days after start of care, with documentation explicitly addressing both homebound status (taxing effort to leave home, normally unable to leave) and the need for skilled services. The encounter note must come from the certifying provider's record, not the home health agency's narrative. Humana's Medicare Advantage plans add their own face-to-face elements that differ from traditional Medicare requirements. Missing or non-compliant face-to-face documentation invalidates the episode entirely under both COP requirements and payer review, resulting in full episode recoupment. The Conditions of Participation these requirements sit under are codified at 42 CFR part 484, and the Patient-Driven Groupings Model that pays the period took effect in January 2020.
Home Health-Specific Payer Issues We Watch For
Medicare
Issue: PDGM eliminated therapy visit thresholds and pays each 30-day period from clinical grouping, functional impairment level and comorbidity adjustment instead, so an OASIS functional item or principal diagnosis scored against the clinician's impression rather than against the clinical record moves the period into a different case-mix group and a different payment — CMS publishes the weight for every group in the annual HH PPS rule, and how far the payment moves depends on which groups the period sits between, so we do not quote a single percentage for it
Our approach: We review every OASIS assessment for billing-impactful items before claim submission and flag cases where clinical grouping or functional scores appear inconsistent with the patient's documented condition
UnitedHealthcare
Issue: Uses its own episode payment model that does not align with Medicare PDGM and requires separate authorization for each 60-day episode
Our approach: We maintain UHC's home health payment rules separately from Medicare and submit episode authorizations with clinical documentation configured to UHC's coverage criteria
Humana
Issue: Requires face-to-face encounter documentation within 90 days before or 30 days after the start of the home health episode, with specific elements that differ from Medicare's requirements
Our approach: We verify face-to-face documentation completeness against both Medicare and Humana-specific requirements before initiating each episode
Medicaid
Issue: State Medicaid home health benefits vary significantly in covered visit types and frequency limits, with some states not covering home health aide services at all
Our approach: We maintain state-specific Medicaid home health coverage matrices and verify benefit eligibility before episode planning to prevent uncovered service delivery
What We Handle
PDGM 30-day period classification across 432 case-mix groups
Per-period verification of all five PDGM dimensions — clinical grouping, admission source, timing, functional impairment level and comorbidity adjustment. Case-mix weight projection at SOC and recert with payment-impact review before the OASIS is locked.
OASIS-E review on payment-driving items (M1021, M1023, M1800–M1860)
Clinical-record-to-OASIS consistency review across functional ADL items and primary/secondary diagnoses. M1033 hospitalization risk, GG functional outcome items, and the comorbidity-adjustment-eligible secondary diagnoses verified against the chart.
Notice of Admission (NOA) submission within the 5-day window
NOA filed within 5 calendar days of start of care to prevent the per-day timely-filing payment reduction. Final claim with every visit line carrying the G-code CMS assigns to that discipline — G0151 physical therapist, G0157 physical therapist assistant, G0152 occupational therapist, G0158 occupational therapy assistant, G0153 speech-language pathologist, G0299/G0300 skilled nursing by RN/LPN, G0155 medical social services, G0156 home health aide — sequenced and submitted within timely filing.
LUPA threshold tracking per case-mix group
Real-time visit-count tracking against the clinical-grouping-specific LUPA threshold (2–6 visits) with clinical-team alerts when a 30-day period is at risk of dropping into per-visit LUPA payment.
Face-to-face encounter and physician certification compliance
Face-to-face documentation review against the 90-day-prior or 30-day-after window, certifying provider attestation, and homebound-status plus skilled-need documentation per CMS COP requirements.
Medicare Advantage payment-model coordination
MA plan-specific payment model tracking for plans that operate distinct from traditional Medicare PDGM. UHC, Humana, and Anthem MA episode authorization workflows separated from traditional Medicare PDGM submission paths.
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Key Home Health CPT Codes
| CPT Code | Description | Medicare Amount CY2026 national, non-facility |
|---|---|---|
| G0151 | Services performed by a qualified physical therapist in the home health or hospice setting, each 15 minutes | — |
| G0152 | Services performed by a qualified occupational therapist in the home health or hospice setting, each 15 minutes | — |
| G0153 | Services performed by a qualified speech-language pathologist in the home health or hospice setting, each 15 minutes | — |
| G0155 | Services of a clinical social worker under a home health plan of care, each 15 minutes | — |
| G0156 | Services of a home health aide under a home health plan of care, each 15 minutes | — |
| G0157 | Services performed by a qualified physical therapist assistant in the home health or hospice setting, each 15 minutes | — |
| 99345 | Home visit, new patient, high complexity | $210 |
| 99350 | Home visit, established patient, high complexity | $193 |
Amounts are the Medicare national unadjusted non-facility amounts for CY2026, computed from the published CMS relative value file. They are not what a commercial payer pays, and your locality adjustment moves them. A dash means Medicare publishes no amount for that code — because it is non-covered, bundled, or priced outside the fee schedule.
Why General Billing Teams Miss Home Health Issues
General billing staff handle dozens of specialties and rarely develop the depth needed for home health coding nuances. Here is what gets missed.
Modifier and bundling errors
Specialty-specific modifier rules and CCI edits are frequently overlooked by teams that do not work exclusively in home health.
Under-coding high-complexity visits
Home Health encounters often qualify for higher-level E/M codes, but generalist billers default to mid-level codes to avoid audit risk.
Missed payer-specific rules
Each payer has unique coverage and documentation requirements for home health procedures that general teams rarely memorize.
Slow denial turnaround
Without specialty knowledge, appeal letters lack the clinical specificity needed to overturn home health denials quickly.
“In home health, the OASIS assessment is the billing claim. Every inaccurate item directly reduces the case-mix weight and the episode payment. Getting OASIS right is not a clinical issue — it is a revenue issue.”
MedPrecision Billing Team
Home Health Revenue Cycle Director
Transition Plan
Switching billing partners should not disrupt patient care or cash flow. Our transition plan is designed for zero downtime.
Discovery and Specialty Audit
We review your current home health billing workflows, denial patterns, and payer mix to build a tailored onboarding plan.
System Integration
We connect to your EHR and practice management system, configure specialty-specific code sets, and validate charge capture workflows.
Parallel Billing Period
We run billing in parallel with your current process for 2-4 weeks to verify accuracy before taking over completely.
Full Transition and Reporting
Once validated, we assume full billing responsibility with monthly reporting dashboards and a dedicated account manager.
Home Health Billing Terms
- PDGM (Patient-Driven Groupings Model)
- Medicare's home health payment system effective January 2020 that uses clinical grouping, functional impairment level, and comorbidity adjustment to determine per-episode reimbursement. Replaced the therapy-based payment model.
- OASIS (Outcome and Assessment Information Set)
- A standardized patient assessment instrument used by home health agencies for all Medicare and Medicaid patients. OASIS items directly determine the PDGM clinical grouping and functional impairment scores that set episode payment amounts.
- Case-Mix Weight
- A numerical value assigned to each home health episode based on OASIS assessment results. Higher case-mix weights indicate greater patient acuity and result in higher per-episode Medicare reimbursement.
- 30-Day Episode
- Under PDGM, the billing period for home health services. Each 30-day episode is classified independently based on admission source, clinical grouping, functional level, and comorbidity adjustment.
- LUPA (Low Utilization Payment Adjustment)
- A payment reduction applied when a home health episode has fewer than a defined threshold of visits. LUPA episodes are paid per-visit rather than per-episode, typically resulting in significantly lower reimbursement.
- Face-to-Face Encounter
- A physician or allowed NPP encounter with the patient within 90 days before or 30 days after the start of a home health episode, documenting the clinical findings supporting homebound status and the need for skilled services.
Last updated: 2026-09-17
Common Questions
Common questions about home health billing services.
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Request ReviewHow does PDGM affect home health reimbursement?
PDGM determines payment for each 30-day period from five dimensions rather than therapy visit volume: clinical grouping (twelve subgroups), admission source (community or institutional), timing (early or late), functional impairment level (low, medium or high) and comorbidity adjustment (none, low or high). CMS multiplies these out to 432 possible case-mix adjusted payment groups. We verify each period is classified into the correct case-mix group before the claim goes out.
What is a LUPA and how do you prevent them?
A Low Utilization Payment Adjustment occurs when the number of visits in an episode falls below the LUPA threshold, converting payment from a full episode rate to a per-visit rate. We monitor visit counts against the HHRG-specific LUPA threshold and alert clinical teams when additional visits are needed to reach the threshold.
How do you handle physician certification for home health episodes?
We track face-to-face encounter documentation, physician certification, and recertification timelines for every episode. We alert the clinical team when certifications are due and ensure the required documentation elements including homebound status and skilled need are properly recorded.
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